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- Title
Preparation of poly(2-anilinoethanol) containing azobenzene group under electrical field and its liquid crystalline properties investigation.
- Authors
Hosseini, Seyed Hossein; Hoshangi, Vahid
- Abstract
In this project, 2-[N-ethyl-N-[4-[(4′-nitrophenyl)azo]-phenyl]amino]ethanol (Disperse Red-I) was prepared by adding of (N-ethyl-2-anilinoethanol) with the salt diazonium p-nitroaniline. The main mesogenic liquid crystalline (LC) 2-[N-ethyl-N-[4-[4′-nitrophenyl)azo]-phenyl]amino]ethyl-3-chloro propionate (Disperse Red-II) was synthesized by reaction of disperse Red I and 3-chloropropanoeic acid at the alkaline condition. Then 2-anilinoethyl-3-chloropropionate-{2-[ethyl[4-[(4′-nitrophenyl)azo]phenyl]amino] ethanol}, (2AECP-Red-I) was prepared via reaction of disperse red-II and 2-anilinoethanol. On the other hand, poly 2-anilinoethyl-3-chloropropionate-{2-[ethyl[4-[(4′-nitrophenyl)azo]phenyl]amino]ethanol} and poly(2AECP-Red-I) have been synthesized by polymerization of 2AECP-Red-I in two separate schemes. These include polymerization in the absence of electric field (EF) and polymerization under different EFs. A comparison of the results reveals that the polymer produced under electric field is more linear, regular in shape with high electrical conductivity, as well as good LC behavior with semectic texture. The resulted monomer and poly(2AECP-Red-I) are characterized by using Fourier transform infrared and ultraviolet-visible and were studied by thermogravimetric analysis and differential scanning calorimetry. Scanning electron microscopy images supported the formation of poly(2AECP-Red-I) and showed morphology feature and homogeneous structure on poly(2AECP-Red-I). Electrical conductivity of poly(2AECP-Red-I) has been studied by four-point probe method. Copyright © 2014 John Wiley & Sons, Ltd.
- Subjects
AZOBENZENE; ELECTRIC fields; POLYMER liquid crystals; CONDUCTING polymers; POLARIZING microscopes; MESOGENIC groups
- Publication
Polymers for Advanced Technologies, 2015, Vol 26, Issue 1, p10
- ISSN
1042-7147
- Publication type
Article
- DOI
10.1002/pat.3409